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| author | Qu Wenruo <wqu@suse.com> | 2020-05-15 09:01:40 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-05-25 12:25:35 +0300 |
| commit | 92a7cc4252231d1641b36c38cf845cfc50308ab0 (patch) | |
| tree | 9dcd3b8ba373c5c064563bfd8ce4be772901d5e3 /fs/btrfs/ioctl.c | |
| parent | ae3e715f85fff878b317369b898cf4b89785c80a (diff) | |
| download | linux-92a7cc4252231d1641b36c38cf845cfc50308ab0.tar.xz | |
btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE
The name BTRFS_ROOT_REF_COWS is not very clear about the meaning.
In fact, that bit can only be set to those trees:
- Subvolume roots
- Data reloc root
- Reloc roots for above roots
All other trees won't get this bit set. So just by the result, it is
obvious that, roots with this bit set can have tree blocks shared with
other trees. Either shared by snapshots, or by reloc roots (an special
snapshot created by relocation).
This patch will rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE to
make it easier to understand, and update all comment mentioning
"reference counted" to follow the rename.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 40b729dce91c..709d9446896a 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -750,7 +750,7 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir, int ret; bool snapshot_force_cow = false; - if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state)) + if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state)) return -EINVAL; if (atomic_read(&root->nr_swapfiles)) { |